Download AMMO 28 DL ELECTRICAL EXPLOSIVES SAFETY FOR ARMY FACILITIES AMMO 47 DL LIGHTNING and more Exams Military Strategy and Training in PDF only on Docsity!
AMMO 28 DL ELECTRICAL EXPLOSIVES
SAFETY FOR ARMY FACILITIES AMMO 47
DL LIGHTNING PROTECTION FOR AIR
FORCE FACILITIES TEST BANK | LATEST
EXAM QUESTIONS AND ANSWERS 2024 |
ALREADY GRADED A+
What is the maximum allowable resistance reading for a 3-point fall-of- potential earth resistance test? -----CORRECT ANSWER------------25 ohms or less How often is a bonding resistance test required on an LPS? -----CORRECT ANSWER------------Every 24 months What is the maximum allowable reading for a bonding resistance test on an LPS conductor? -----CORRECT ANSWER------------1 ohm or less When conducting a bonding resistance test on an integral LPS with 10 air terminals and two down conductors, how many individual resistance tests are required, at a minimum? -----CORRECT ANSWER------------ 20 How many down conductors are required for a building with a perimeter length of 325 feet? -----CORRECT ANSWER------------ 4 While conducting an LPS inspection, you see mast down conductors routed as shown in the image below. Do you write it up as a discrepancy? Why or
why not? -----CORRECT ANSWER------------Yes, because mast down conductors should be 180 degrees apart. A steel beam, connected to the main LPS at its upper and lower extremities, is used as a down conductor. At what intervals should it be connected to the grounding system? -----CORRECT ANSWER------------ 60 feet or less Which statement about grounding systems is true? -----CORRECT ANSWER------------The resistance should be 25 ohms or less. While conducting a bonding resistance test on the integral LPS below, you placed test leads on ground rod S and air terminal N. Which three bonds listed below are NOT being tested? -----CORRECT ANSWER------------B H P What information should be in a destructive weather plan? Select all that apply. -----CORRECT ANSWER------------Which operations to shut down Who is responsible for shutting down each operation Steps for shutting down each operation Instructions for evacuating personnel Instructions for restarting each operation Which two publications provide detailed information on lightning protection systems? -----CORRECT ANSWER------------DA PAM 385- 64 NFPA 780
During the inspection, John's team logged a discrepancy for this air terminal. Why? -----CORRECT ANSWER------------The air terminal is not attached to a conductor. Which of the following statements regarding bonding are true? Select all that apply. -----CORRECT ANSWER------------Bonding reduces the threat of sideflash by providing a low impedance path to ground. Bonding is a way of connecting LPS conductors to grounded metal objects. When should a grounded metal object be considered for bonding? ----- CORRECT ANSWER------------When it's within 6 feet of a conductor Which bonding method is the most permanent and secure? -----CORRECT ANSWER------------Exothermic weld Which factors are used to calculate bonding distance?Select all that apply. -----CORRECT ANSWER------------Height of proposed bond Flashover medium Number of down conductors While conducting the inspection, John's team noticed a new metal light pole installed 3 feet from the down conductor at the corner of this building. They logged a discrepancy. Why? -----CORRECT ANSWER------------ Because grounded metal objects within 6 feet of LPS conductors should be bonded to it
Which types of information does an LPS record provide? Select all that apply. -----CORRECT ANSWER------------Test locations Test item descriptions or listing Type of test Responsibilities for conducting and administering the test plan Which section of DA PAM 385-64 provides LPS visual inspection guidance? -----CORRECT ANSWER------------Appendix D How often is a visual inspection required on an LPS? -----CORRECT ANSWER------------Every 12 months While conducting the LPS inspection, the team saw these surveillance cameras. Does this building comply with LPS standards? -----CORRECT ANSWER------------No, because the surveillance cameras are outside the zone of protection. How long must LPS test results be kept on file? -----CORRECT ANSWER-- ----------6 inspection cycles How often is a conductive floor electrical test required in an ESD-sensitive operating facility? -----CORRECT ANSWER------------Every 6 months
Alerts when lightning strikes are imminent What is the primary danger in a hazardous classified location? ----- CORRECT ANSWER------------Explosive atmosphere Which division describes a hazardous classified location with greatest probability of ignition or explosion? -----CORRECT ANSWER------------ Division 1 Which two agencies tests and certify explosion-proof electrical equipment? -----CORRECT ANSWER------------Army Ordnance Safety and Security Activity (AOSSA) Factory Mutual (FM) Underwriter's Laboratory (UL) Which device does NOT emit electromagnetic radiation? -----CORRECT ANSWER------------Calculator Which three are hazards posed by electromagnetic radiation? ----- CORRECT ANSWER------------Generation of extreme heat in the human body ignition of fuel and other combustibles Activation or disabling of electrically initiated devices (EIDs)
Which two precautions should you take when approaching EMR-vunerable ordnance with a hand-held radio? -----CORRECT ANSWER------------ Enclose the ordnance completely in a sealed, all-metal container Turn off the radio when within 10 feet of ordnance While conducting an LPS inspection, you discover the scenario illustrated in the image below. Do you write it up as a discrepancy? Why or why not? - ----CORRECT ANSWER------------Yes, because the air terminal is not attached to a conductor. How many down conductors are required for a building with a perimeter length of 425 feet? -----CORRECT ANSWER------------ 5 Which material is preferred for ground conductors? -----CORRECT ANSWER------------copper What does h represent in the Basic Bonding Formula? -----CORRECT ANSWER------------Height of the proposed bond What does n represent in the Basic Bonding Formula? -----CORRECT ANSWER------------Number of down conductors Calculate the BBF to determine if bonding is required for the scenario below. Use a calculator, the BBF equation aid, and the bonding job aid as required.
- The metal vent is 15 feet high.
Which radiation hazard category describes the danger of detonation or device failure resulting from exposing electrically initiated devices (EIDs) to EMR? -----CORRECT ANSWER------------HERO Which HERO classification describes items that may explode or detonate if exposed to EMR? -----CORRECT ANSWER------------HERO unsafe How many feet radius does the DoD require for an LPS zone of protection? ------CORRECT ANSWER------------100 ft Which statement regarding lightning protection is false? ------CORRECT ANSWER------------lightning protection system prevents lightning strikes from occurring. While conducting an LPS inspection, you discover the scenario illustrated in the image below. Do you write it up as a discrepancy? Why or why not? - -----CORRECT ANSWER------------Yes, because the air terminal is not attached to a conductor. How many down conductors are required for a mast LPS? ------CORRECT ANSWER------------WRONG 4 WRONG 3 Which material is preferred for ground conductors? ------CORRECT ANSWER------------Copper
What does n represent in the Basic Bonding Formula? ------CORRECT ANSWER------------Number of down conductors What does Km represent in the Basic Bonding Formula? ------CORRECT ANSWER------------WRONG Height of the proposed bond During an LPS inspection you notice a grounded metal pipe 3 feet from a conductor. Should you write it up as a possible discrepancy? ------ CORRECT ANSWER------------Yes. Grounded metal objects within 6 feet of a conductor should be considered for bonding What does D represent in the Basic Bonding Formula? ------CORRECT ANSWER------------Bonding distance Which bonding condition applies to isolated metal objects surrounded by non-conductive material (such as a metal door frame in a concrete wall)? -- ----CORRECT ANSWER------------WRONG Condition 2 Calculate the BBF to determine if bonding is required for the scenario below. Use a calculator, the BBF equation aid, and the bonding job aid as required.
- The metal vent is 15 feet high.
- There are 2 down conductors at the proper spacing.
- The vent is 12 inches (1 foot) from a conductor through air. ------ CORRECT ANSWER------------Bonding distance for the metal roof vent is 1 foot 8 inches. Bonding is required.
How many individual bonding resistance tests are required on an integral LPS with 12 air terminals and 2 down conductors? ------CORRECT ANSWER------------ 24 Which storm warning system measures the strength of atmospheric electric fields and warns of the possibility of lightning strikes? ------CORRECT ANSWER------------Pre-strike Which hazardous classified location division poses the least probability of ignition or explosion? ------CORRECT ANSWER------------Division 2 Which material belongs to hazardous classified location Class II? ------ CORRECT ANSWER------------coal dust Which material belongs to hazardous classified location Class I? ------ CORRECT ANSWER------------acetylene gas Which HERO classification describes items that may explode or detonate if exposed to EMR? ------CORRECT ANSWER------------HERO UNSAFE Which of the following is NOT a hazard posed by electromagnetic radiation? ------CORRECT ANSWER------------WRONG ignition of fuel and other combustibles
Which statement regarding lightning protection is false? ------CORRECT ANSWER-------------lightning protection system prevents lightning strikes from occurring. How many down conductors are required for a mast LPS? ------CORRECT ANSWER------------- 2 Which material is preferred for ground conductors? ------CORRECT ANSWER-------------Copper What does n represent in the Basic Bonding Formula? ------CORRECT ANSWER-------------Number of down conductors What does Km represent in the Basic Bonding Formula? ------CORRECT ANSWER-------------flashover medium During an LPS inspection you notice a grounded metal pipe 3 feet from a conductor. Should you write it up as a possible discrepancy? ------ CORRECT ANSWER-------------Yes. Grounded metal objects within 6 feet of a conductor should be considered for bonding What does D represent in the Basic Bonding Formula? ------CORRECT ANSWER-------------Bonding distance
An LPS requires three-point fall-of-potential earth resistance testing every - -----CORRECT ANSWER-------------Every 24 months When conducting a 3-point fall-of-potential earth resistance test, what is the maximum allowable resistance reading? ------CORRECT ANSWER----------- --25 ohms When conducting a bonding resistance test, what is the maximum allowable reading? ------CORRECT ANSWER-------------1 ohm How many individual bonding resistance tests are required on an integral LPS with 12 air terminals and 2 down conductors? ------CORRECT ANSWER------------- 24 Which storm warning system measures the strength of atmospheric electric fields and warns of the possibility of lightning strikes? ------CORRECT ANSWER-------------Pre-strike Which hazardous classified location division poses the least probability of ignition or explosion? ------CORRECT ANSWER-------------Division 2 Which material belongs to hazardous classified location Class II? ------ CORRECT ANSWER-------------coal dust Which material belongs to hazardous classified location Class I? ------ CORRECT ANSWER-------------acetylene gas
Which HERO classification describes items that may explode or detonate if exposed to EMR? ------CORRECT ANSWER-------------HERO UNSAFE Which of the following is NOT a hazard posed by electromagnetic radiation? ------CORRECT ANSWER-------------WRONG ignition of fuel and other combustibles WRONG generation of extreme heat in the human body For guidance on lightning protection requirements, you use AFI 32- 1065 and ------CORRECT ANSWER-------------NFPA 780 You need to inspect an LPS that has vertical poles connected to overhead cables that stretch the length of the structure. What type of LPS does this describe? ------CORRECT ANSWER-------------catenary How many feet radius does the DoD require for an LPS zone of protection? ------CORRECT ANSWER-------------100ft While conducting an LPS inspection, you discover the scenario illustrated in the image below. Do you write it up as a discrepancy? ------CORRECT ANSWER-------------yes, because the air terminal is not attached to a conductor. While conducting an LPS inspection, you see down conductors like those illustrated in the image below. Do you write it up as a discrepancy? ------
When conducting a fall-of-potential ground resistance test on a facility where ammunition and explosives are stored, what is the maximum allowable resistance reading for an LPS? ------CORRECT ANSWER---------- ---25 ohms While conducting an LPS inspection, you see the scene in the image below. Does this comply with LPS standards? ------CORRECT ANSWER--- ----------no, because the surveillance cameras are outside the zone of protection For best accuracy, how many individual resistance tests should be performed on this conductive floor? ------CORRECT ANSWER------------- 10 tests: 5 electrode-to-electrode and 5 electrode-to-ground tests Which test is used to verify the integrity of the LPS grounding system? ------ CORRECT ANSWER-------------fall-of-Potential Ground Resistance Test Which test is used to verify the integrity of air terminals and down conductors? ------CORRECT ANSWER-------------continuity/Resistance Test How many individual continuity/resistance tests are required on an integral LPS with 12 air terminals and 2 down conductors? ------CORRECT ANSWER-------------WRONG 12 24
When performing a conductive floor test, what is the minimum distance required between test electrodes and grounded metal objects? ------ CORRECT ANSWER-------------WRONG 6 feet According to the identification plate below, the component is certified for Group C and ------CORRECT ANSWER-------------WRONG group B Which bonding condition applies to isolated metal objects surrounded by non-conductive material (i.e., a metal door frame in a brick wall)? ------ CORRECT ANSWER-------------WRONG Condition 1 Which statement regarding bonding is true? ------CORRECT ANSWER------ -------Bonding reduces the threat of sideflash by providing a low impedance path to ground While conducting a continuity/resistance test on the integral LPS below, test leads are placed on ground rod S and air terminal N. In addition to bonds A, J, and M, which bond is being tested? ------CORRECT ANSWER- ------------WRONG H When conducting a continuity/resistance test on a conductor less than 65 feet long, the maximum allowable reading is ------CORRECT ANSWER------ -------WRONG 5 ohms WRONG 25 ohms When conducting a fall-of-potential ground resistance test on a facility measuring 130 feet diagonally, how far from the ground rod should the P test probe be placed? ------CORRECT ANSWER-------------65 feet
